如何将一个按钮添加到tableview的最后一行？

Question

我无法找到解决方案如何在UITableViewCell中添加此“加载更多”按钮。

像 “更多结果...” 选项，在这个应用程序

http://itunes.apple.com/in/app/zdnet/id425580940?mt=8

希望有人能帮助我...

Answer 1

而不是普通的内容，使得你的上单元格UIButton。当用户单击它时，用新信息更新数据源（不要忘记更新每个部分中的行数），并在tableview上调用reloadData。始终将按钮保持在最底部的单元格中。

如何更新数据源完全取决于您的实施。

要将按钮添加到一个UITableViewCell你可以的cellForRowAtIndexPath做到这一点：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ 
    if (indexPath.row == dataForCells.count + 1){ // Assume dataForCells is an NSArray holding your data. Initially it should hold 10 objects, then after clicking this button it will be 20, 30, etc. as you load data in load10MorePressed. However, this depends on your implementation. You could be storing your data in some other way. 
     static NSString *CellIdentifier = @"LoadMoreCell"; 

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
     if (cell == nil) { 
      cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; 
     } 

     UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
     button.frame = CGRectInset(cell.frame, 5, 5); 
     [button setTitle:@"Load 10 More" forState:UIControlStateNormal]; 
     [button addTarget:self action:@selector(load10MorePressed:) forControlEvents:UIControlEventTouchUpInside]; 
     [cell addSubview:button]; 
    } else { 
     static NSString *CellIdentifier = @"NormalCell"; 

     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
     if (cell == nil) { 
      cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; 
     } 

     // Setup your normal data cells here 
    } 
} 

但是你要确保你有一个名为load10MorePressed方法：

-(IBAction)load10MorePressed:(id)sender{ 
    NSMutableArray *temp = [NSMutableArray arrayWithArray:dataForCells]; 
    for (int x=0; x<10; x++){ 
     [temp addObject:[Create new objects here. Depends on your implementation, probably downloading from someplace...]]; 
    } 
    self.dataForCells = temp; 
    [self.tableView reloadData]; 
} 

最后，不要” t忘记返回桌面视图中的单元格数量：

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ 

    if (section == 0){ 
     return dataForCells.count + 1; 
    } else { 
     return 0; 
    } 
} 

Answer 2

As far a我的知识你可以这样做。

把按钮加载多了。当用户点击buttonAction中的按钮时，取一个BOOL变量，然后使用[tableview reloadData];然后在numberofrowsintableview方法中检查BOOL变量。如果是，则返回（Ex： ）10 + previousrows.Pass数据也

Answer 3

我明白你的问题： - 你要做的是在表视图下面添加一个活动指标。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 

    static NSString *CellIdentifier = @"Cell"; 

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 
    if (cell == nil) { 
     cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease]; 
    } 
    cell.textLabel.text=[self.array objectAtIndex:indexPath.row]; 

    if (indexPath.row ==[array count] -1) { //this method will get called when you will scroll to the bottom of your table view 
     [self sendRequestMethod]; 

    } 
    else { 
     //NSLog(@"not nearest row"); 
     //[self remove]; 
    } 

    return cell; 
} 

-(void)sendRequestMethod 
{ 
    [self.newTableView setUserInteractionEnabled:NO]; 
    [indicator startAnimating];//make sure you start your indicator now perform what you want to do IN my case I am sending a request to server 

    NSString *str = [NSString stringWithFormat:@"http://www.google.com"]; 
    NSURL *url = [NSURL URLWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; 
    ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url]; 
    [request setRequestMethod:@"POST"]; 
    [request setDelegate:self]; 
    [request setDidFinishSelector:@selector(responseSuccedMethod:)]; 
    [request setDidFailSelector:@selector(responseFailedMethod:)]; 
    [networkQueue addOperation: request]; 
    [networkQueue go]; 


} 

-(void)responseSuccedMethod:(ASIHTTPRequest *)req 
{ 
    [self.newTableView setUserInteractionEnabled:YES]; 
    [indicator stopAnimating]; 
    [newTableView reloadData]; 

} 

Answer 4

也许做到这一点更简单的方法是采用tableView:viewForFooterInSection:和tableView:heightForFooterInSection方法，并与“加载更多结果”按钮返回视图。

-(id)init 
{ 
    self = [super init]; 
    if(self) { 
     // create a footer view so that we can add it later when we need to 
     loadMoreView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)]; 
     UIButton* moreButton = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
     [[moreButton titleLabel] setText:@"Load More Results"]; 
     [moreButton addTarget:self action:@selector(loadMore:) forControlEvents:UIControlEventTouchUpInside]; 
     [loadMoreView addSubview:moreButton];    

     // other init code here 
    } 
    return self 
} 

-(UIView*)tableView:(UITableView*)tv viewForFooterInSection:(NSInteger)s 
{ 
    return loadMoreView; 
} 
-(CGFloat)tableView:(UITableView*)tv heightForFooterInSection:(NSInteger)s 
{ 
    return [loadMoreView frame].size.height; // or 40 since that's what we set it to 
}